I appreciate that Colin puts the target concentrations on the website, and you'll notice that Thrive S is also lower on nitrates.
Yes, you are safe using just about any other fertilizer out there and be safe with shrimp, but this makes it easy for those not as familiar with dry ferts.
My only concern would be Cu deficiency if using RO and remineralizing. I haven't heard of this with anyone yet, but it's something to keep an eye on.
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